Camera system with interference pattern suppression

Patent metadata

Field	Value
Publication number	US-12412417-B2
Application number	US-202218693316-A
Country	US
Kind code	B2
Filing date	Sep 14, 2022
Priority date	Sep 27, 2021
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A camera system includes a sensor having a plurality of pixels sensitive to electromagnetic radiation; and an evaluator. The sensor is arranged behind a semi-transparent layer. The evaluator is configured to suppress an interference pattern occurring on the sensor by a pixel-by-pixel correction.

First claim

The invention claimed is:

1. A camera system, the camera system comprising:
a sensor having a plurality of pixels sensitive to electromagnetic radiation;
an evaluator; and
an illumination arranged behind a semi-transparent layer,
wherein the sensor is arranged behind the semi-transparent layer,
wherein the evaluator is configured to suppress an interference pattern occurring on the sensor by a pixel-by-pixel correction, and
wherein the interference pattern suppression or a correction matrix is configured to take into account distance-dependent interference patterns.

2. The camera system according to claim 1 , wherein the interference pattern suppression is configured to take into account a temperature of the camera system.

3. The camera system according to claim 1 , wherein the interference pattern suppression is configured to be carried out using reference images or their parameterization, whereby the reference images have been captured in advance in a reference measurement and map characteristics of the interference pattern.

4. The camera system according to claim 3 , wherein the evaluator is configured to calculate the correction matrix for the interference pattern suppression using the reference images.

5. The camera system according to claim 3 , wherein the reference images or their parameterization are recorded at different temperatures.

6. The camera system according to claim 1 , wherein the interference pattern suppression is configured to take into account properties of the semi-transparent layer.

7. The camera system according to claim 1 , wherein the interference pattern suppression is configured to calculate a pixel-by-pixel correction matrix at runtime based on the preceding images.

8. The camera system according to claim 1 , wherein the sensor is configured as a depth sensor.

9. The camera system according to claim 1 , wherein the sensor is configured as a 2D sensor, and
wherein the camera system additionally comprises a depth sensor.

10. The camera system according to claim 1 , wherein the semi-transparent layer is configured as a display.

11. A mobile handheld device comprising the camera system according to claim 1 .

Assignees

• Ifm Electronic Gmbh
• pmdtechnologies ag
• Pmd Tech Ag

Inventors

• Stosch Jan Hinnerk
• Ulrich Stephan
• Lottner Oliver

Classifications

• H04N23/52

  Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements · CPC title

• G06V40/1318

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title

• G06V40/12

  Fingerprints or palmprints · CPC title

• G06V40/13

  Sensors therefor · CPC title

• H04N25/617

  for reducing electromagnetic interference, e.g. clocking noise · CPC title